Fig. 2From: Dexmedetomidine sedation during the nighttime reduced the incidence of postoperative atrial fibrillation in cardiovascular surgery patients after tracheal extubationDefinition of the observation period. Day 1: 24 h from 8 p.m. on the extubation day to 8 p.m. on the next day. Day 2: 24 h from 8 p.m. on the next day to 8 p.m. 2 days later following the extubation day. Dex dexmedetomidineBack to article page